*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970169380164
197003190022
1971304007
1972101002
19730280010
19740560011
1975005005
1976013004
1977207009
197813100014
197902190021
19801680015
1981313007
1982112004
19830280010
1984023005
198527100120
198657180131
1987111150128
1988612160236
19892313511189
199036458800169
1991245413400212
19921025812800288
19938412921500428
19945512513900319
19954913819300380
19965513819401388
1997309913701267
199856639100210
199910477400131
200014227600112
200118308503136
2002829610199
20032278901119
200434205400108
200527229000139
20061497900102
20074625700105
2008231010900142
2009121315300178
2010104112400175
201168340048
201216240031
201346240034
20145054900104
2015524270056
20161418370069
20171013500073
2018310370050
20191112460069
2020510380053
2021159470071
2022410400054
2023125008
202415130019
Total934131630951145360